function Y = hammsig78Scart(kx,ky)
% kr=abs(kx+1i*ky);

kfl = 39/19.2;

%hex limit, large radial rolloff:
Y=(abs(kx)<kfl).*(abs(ky)<kfl).*(0.54+0.46*cos(pi*abs(kx)/kfl)).*(0.54+0.46*cos(pi*abs(ky)/kfl));